Never explicitly inherit from object in Python 3-only stubs (#6777)

stdlib/_random.pyi

@@ -1,7 +1,7 @@
 # Actually Tuple[(int,) * 625]
 _State = tuple[int, ...]
 
-class Random(object):
+class Random:
     def __init__(self, seed: object = ...) -> None: ...
     def seed(self, __n: object = ...) -> None: ...
     def getstate(self) -> _State: ...